Maytag Dishwasher: not draining completely

Professional Repair Guide

What is this symptom?

Experiencing standing water in your Maytag dishwasher after a wash cycle? This common issue can stem from a clogged filter, blocked drain hose, or a malfunctioning pump. Learn how to troubleshoot and fix this problem to restore proper drainage.

Urgency: Medium

Important Tips for Maytag Models

  • New installations often fail to drain if the garbage disposal knock-out plug wasn’t removed or drain hose lacks a proper high loop/air gap.

Possible Causes

Clogged dishwasher filter

How to Identify: Visible food debris or gunk on or around removable filter screen at bottom of tub; standing water after cycle ends.

Part: Dishwasher filter

Blocked drain hose

How to Identify: Water remains and drain hose is kinked, crushed, or blocked; traces of food/debris visible when disconnecting hose under sink; no water flows when hose removed.

Part: Drain hose

Clogged or blocked garbage disposal or air gap

How to Identify: Dishwasher drains into a disposer; disposer or air gap clogged and water backs up; air gap cap difficult to remove or visibly filled.

Part: Garbage disposal/air gap

Faulty drain pump or motor assembly

How to Identify: Pump hums but does not drain; unusual noises during drain cycle; no electrical activity at pump when tested.

Part: Drain pump and motor

Drain solenoid or valve failure

How to Identify: Valve doesn’t actuate during drain cycle; electrical tests show no activation; filter and hose clear but water remains.

Part: Drain solenoid/valve

DIY Solutions

Clean dishwasher filter and remove debris

Easy 10-20 minutes
Tools Needed: screwdriver (if needed), warm water, soft brush
  1. Remove bottom dish rack
  2. Locate and remove dishwasher filter
  3. Rinse filter under running water and scrub with soft brush
  4. Reinstall filter and run a short cycle to test drainage
⚠️ Safety First: Disconnect power or ensure dishwasher off before cleaning

Inspect and clear drain hose blockages

Moderate 20-30 minutes
Tools Needed: adjustable wrench, bucket, flashlight
  1. Turn off dishwasher power and water supply
  2. Locate drain hose under sink and disconnect at both ends
  3. Check and clear debris from hose and straighten any kinks
  4. Reattach hose securely and test dishwasher
  5. Ensure high loop or air gap installation as per manual
⚠️ Safety First: Place bucket under hose to catch water

Clear air gap or garbage disposal blockage

Moderate 15-30 minutes
Tools Needed: screwdriver, small brush, hex wrench for disposal
  1. Remove air gap cap and clear debris
  2. Run garbage disposal to clear internal clogs
  3. Check dishwasher drain connection at disposal
  4. Test dishwasher drain function
⚠️ Safety First: Turn off power to garbage disposal before working

Next step

Choose the next step for not draining completely

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Drain Hose

Carries waste water from the drain pump to your home's standpipe or sink drain.

$15 - $30 · Easy · 15-30 mins

Check fit & price
Possible related component

Drain Pump

Pumps waste water out of the appliance during the drain cycle.

$35 - $80 · Easy · 15-30 mins

Check fit & price
Model number required

Model-compatible Dishwasher parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.

Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dishwasher Cleaner and Descaler

Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.

View maintenance supply
Maintenance supply

Braided Dishwasher Inlet Hose

For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Professional Repairs

Replace drain pump and motor assembly

Estimated Cost: $100 - $300

Replace drain solenoid or valve

Estimated Cost: $50 - $150

Professional installation check and re-route hoses

Estimated Cost: $80 - $150 service call

When to Call a Professional

Drain pump hums but doesn’t remove water
Electrical issues indicated (no power to pump)
Persistent standing water after DIY checks
Unusual noises during drain cycle

Preventive Maintenance

  • Clean dishwasher filter: Clogs that lead to drainage problems
    Frequency: monthly
  • Run garbage disposal periodically: Backups from disposal affecting dishwasher drainage
    Frequency: weekly

Frequently Asked Questions

Why is my Maytag Dishwasher not draining completely?
Common causes include a clogged filter, blocked drain hose, or faulty drain pump.
How do I fix Maytag Dishwasher not draining completely myself?
Start by cleaning the filter, checking the drain hose, and clearing any blockages.
How much does it cost to fix not draining completely?
Professional repairs can range from $50 to $300, depending on the issue.
When should I call a technician for not draining completely?
If DIY solutions fail or if you suspect a faulty pump, it's time to call a pro.

References & Sources

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

  • Clogged drain hose
  • Faulty drain pump
  • Blocked filter or sump area

User Suggested Solutions

  1. Inspect and clear the drain hose. Disconnect the hose from the dishwasher and check for clogs. Clean it thoroughly and reconnect.

  2. Test the drain pump for functionality. If it doesn't operate when activated, consider replacing it.

  3. Remove and clean the filter and sump area. This can often be done by hand and requires no special tools.

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Maytag Dishwasher Model MDB8959SBS1 still won't drain!! At m...

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